I seem to be stuck. Ratsu is inebriated, Riku and Hare are cursed(?) by Ratsu(oops) and I don't seem to have access to an item that allows me to trade for the tonic to heal Ratsu. I've tried everything I can get to. Sake, berries, fish, egg, mushroom, chocolate. I mean, I have a save I can go back too, but it was frustrating to get stuck without a way to advance is all. Just wanted to let you know about it.
Enjoying the game otherwise so far :)